Door-opener.



W, I-I. EDWARDS.

- Doon OPENER, APPLICATION FILED O T.15, IQOB.

Patnd A111120, 1909.

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W. H. EDWARDS.

DOOR OPENER.

APPLICATON FILED OCT. 15, 1908.

PmncedfApr. 20,1909.

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WILLIAM H. EDWARDS, OF TERRE HAUTE, INDIANA.

DOOR-OPENER.

Specification of Letters Patent.

Patented April 2o, 190e.

Application filed. October 15, 1908. Serial No. 457,899.

To all whom 'it may concern.'

Be it known that I, WILLIAM H. EDWARDS, a citizen of the United States,residing at Terre Haute, in the county of Vigo and State of Indiana,have invented certain new and useful Improvements in Door-Gpeners; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in door openers.

The object of the invention is to provide an improved door openingmechanism adapted to be applied to any form of door whereby the lattermay be automatically opened by the weight of a person approaching thesame, and which will automatically close the same after the weight of aperson has been removed.

With this and other objects in view, the invention consists of certainnovel features of construction, combination and arrangement of parts aswill be described and particularly pointed out in the appended claims,

In the accompanying` drawings, Figure 1 is a front view of a doorshowing the application of the operating mechanism thereto, parts of theiloor in front of the door and of the operating mechanism connectedthereto being shown in section Fig, 2 is a horizontal sectional viewthrough the door casing immediately above the door showing a top planview of the operating mechanism; Fig. 3 is a vertical transversesectional view throughA the floor and the hinged tread piece, showingthe manner in which the latter engages and actuates the door-openingmechanismwhen the weight is applied thereto; Eig. L1 is a rear view ofthe door showing the arrangement of the closing mechanism; and Eig 5 isa detail perspective view of the door-opening lever Referring moreparticularly to the drawings, 1 denotes a door frame in which is hingeda swinging door, 2- In the licor or platform, 3, immediately in front ofthe door is formed a loose section or panel, 4, which is hinged at oneend to the floor or platform joists, 5, or to any part of the supportingstructure or framework of the platform in such manner that the end ofthe panel adj acent to the free end of the door may move up and down.The loose panel, 4, is provided with suitable cleats or otherconstruction to prevent the same from warping, and the free end of saidpanel rests upon and is normally held in an elevated position by meansof a combined supporting and operating lever, 6, one end of which issuitably hinged to the framework beneath the platform or licor, whilethe opposite end is connected to and supported by the lower end of aconnecting rod, 7, the upper end of which has an adjustable connectionwith one end of a bell crank lever, 8, by means of an eye-bolt, 9, whichpasses through a slot in the end of one of the arms of the bell cranklever and has applied to its upper end an adjusting nut 10, in the lowerside of which is formed a V-shaped notch, 12, which engages a V-shapedprojection, 13, formed on the end of the bell crank lever, as shown. Theengagement of the nut, 10, with the projection, 13, in the mannerdescribed, provides for a free rocking or pivotal movement between theseparts,

The bell crank lever, 8, is pivoted in a supporting bracket, 1e, securedin suitable position on the side of the door frame near the upper end ofthe door, and in the upper arm of the lever is formed a series of holes,15, by means of which the outer end of an operating rod, 16, isadjustably connected to said lever. The opposite end of the operatingrod is preferably threaded and said threaded end is adapted to bescrewed into a threaded socket, 17, the opposite end of which ispreferably bifurcated, and is connected to one end of an operatinglever, 18, which is pivotally mounted in a suitable bearing bracket, 19,secured to the door frame adjacent to and above the hinged end of thedoor. The lever 18 is provided midway between its ends with oppositelyprojecting hubs or bosses, through which, and through the lever, isformed a passage to receive the pivot pin of the lever, the ends ofwhich are secured in the arms of the bracket, 19, whereby said lever ispivotally mounted in said bracket.

On the lower hub or boss of the lever 18 is formed a right-angularlyprojecting dooropening arm, 20, on the outer end of which is pivoted ananti-friction roller, 21, which is engaged with a channeled bar ortrack-way,

`22, secured to the upper end of the door, as

shown. On the outer end of the lever,18, is formed a clevis, 23, withwhich is adjustably connected one end of a door-closing spring, 24, theopposite end of which is connected to the door frame above the doorwhereby when the opening mechanism of the door is released said springwill automatically close

